MS Stena Superfast VIII is a fast Ro-Pax ferry owned and operated by Stena Line between Belfast and Cairnryan. The ship was built in 2001 by Howaldtswerke-Deutsche Werft (HDW), Kiel, Germany for Attica Group's subsidiary Superfast Ferries. She was sold to her current owners in 2017.

Stena Line is a Swedish shipping line company and one of the largest ferry operators in the world. It services Denmark, France, Germany, the United Kingdom, Ireland, Latvia, the Netherlands, Norway, Poland, Finland and Sweden. Stena Line is a major unit of Stena AB, itself a part of the Stena Sphere. It is a sister company to one of the world's leading tanker company Stena Bulk.